If Jeff Van Gundy had his way, the USA Basketball team that he’s coaching in the qualifying round for the 2019 Basketball World Cup would have been together for a month of practices to get ready for what he calls a daunting challenge.He had five days.Ready or not, qualifying starts Thursday night in Orlando, Florida — when Van Gundy and a team of largely unheralded G League players take on Puerto Rico in the start of a tournament that will decide if the U.S. goes to the World Cup in China two years from now. Van Gundy led a similar team to a gold medal over the summer in the FIBA AmeriCup, and now a bigger test awaits.”We all felt he’d be perfect to whip up a team that quickly, get them disciplined and ready to go,” said San Antonio coach Gregg Popovich, who will coach the U.S. at the World Cup and the 2020 Tokyo Olympics provided the Americans qualify. “He doesn’t need my help to get it done. He knows what he’s doing.”FIBA, the worldwide governing body for basketball, isn’t making it easy on Van Gundy or the Americans. The U.S., like everyone else, is finding its way…